"A Captain wizzing in a cup on the flight deck because he doesn't want to go to the back to the lav in flight."
Ahhhhh.....You'll have to do better than that.
Seeing what pax guys gotta go through to take a leak since 9/11 makes me dang glad I ended up in freight. If a guy wants to pee in a cup, maybe you should just look the other way. He has my full sympathy....